Scotsman CME250 - Manual (Page 19)

Service Diagnosis:
SYMPTOM POSSIBLE CAUSE PROBABLE FIX
No ice is made, nothing operates Unit off, due to no power Restore power
Unit off, due to master switch in
OFF position Switch master switch to ON
Unit off, due to bin thermostat
open Check temperature at bin
thermostat bracket, if warmer
than 40
o
F., thermostat should be
closed. Adjust/replace thermostat.
Unit off, due to hi pressure cut out
open Reset and check for dirty
condenser, hot location, or water
interruption (if water cooled).
Unit off, due to hi temperature cut
out open Hot gas valve leaking thru,
replace hot gas valve.
Unit off, due to circuit board open Check for short circuit and
replace circuit board.
No ice is made No water due to water turned off. Reconnect water supply
No water due to water filter
plugged. Replace water filter
No water due to inlet water valve
screen plugged Clean out inlet screen
No water due to strainer screen
plugged Clean out inlet screen
No water due to Inlet water valve
coil open Replace valve
No water due to inlet water valve
will not open Replace valve
Water in reservoir, but no water
over evaporators Water pump does not work,
replace pump
No cooling at evaporator due to
compressor switched off Switch compressor on.
No cooling at evaporator due to
too much heat load because inlet
water valve leaks thru Replace inlet water valve
No cooling at evaporator due to
hot gas valve leaking thru Replace hot gas valve
No cooling at evaporator due to
fan not turning Check & replace fan motor or fan
control switch
No cooling at evaporator due to
dirty condenser Clean condenser
CME250
August 1994
Page 19